Model 15-3 with a 2" barrel.
Serial # 8k506xx
Original rear sight leaf has been replaced with incorrect part. The leaf is the correct length but the screw hole is a bit short and previously was bored larger.
I just purchased a sight assembly part #300630 from Numrich. This leaf is about 1/8" short and the mounting screw hole is also wrong.
I have found a S&W part number 5564 in the catalog.
Any help would be appreciated.